No. If you use it all apply in spring. But some of us don’t use fertilisers on shrubs at any time of year.

I use fertilizers in pots, but otherwise I find that the breakdown of compost and mulch in my gardens along with what is already in my soil takes care of all my plants’ needs. If your plants are healthy, no need to fertilize. If they are struggling, have a soil test done to see what nutrients might be missing. Otherwise, adding fertilizer where not needed can contribute to pollution of lakes, rivers, and groundwater, and some nutrients can build up in the soil to create problems.

As floral said, if soil testing indicates that nutrients are missing, add fertilizer early in the growing season when the plants can use them, but will still have a chance to slow down and harden off new growth before cold weather arrives.